25fps PAL to 23.976fps DVD

[Hotskillz]

I am having trouble converting an SVCD from 25fps to 23.976 fps for my DVD player. Can I use just TMPG or do I need other programs to do this. I already used BeSweet to convert the audio but of course the video isnt as easy.

[DJRumpy]

Get DVD2AVI (version 1.76) from here, or the www.doom9.org website. Open the MPEP. Hit F5 to preview. If it reports the VIDEO TYPE as FILM, 90% FILM or higher, set your VIDEO | FIELD OPERATION to 'Force FILM'.

Select FILE | SAVE PROJECT. This will create a D2V file, and an audio file (if you enabled audio in your settings..you already have your converted audio, so this is optional).

At this point, you can use VFAPI Converter to convert the D2V file to a psudeo AVI file, or you can use MPEG2DEC, and AVISynth to convert the file to FILM. I would suggest AVISynth. The script is simple. Assuming all of these files are in the same directly (i.e D2V file, MPEG2DEC.DLL, and your AVISynth .AVS script ), it would look like this:

loadplugin("mpeg2dec.dll")
mpeg2source("output.d2v") #or whatever you called yoru D2V file
AssumeFPS(23.976,True) #This converts it to FILM framerates

Save the above script in Notepad to the same directory as your D2V project file, and your MPEG2DEC.DLL file. Give it a .AVS extension (example: dvd2avi.avs )

This .AVS file can be opened in any encoder, like TMPGenc to encode the video.

[yf2001usa]

i believe you can't play a 23,976 DVD cause DVD only supports 29,97 (NTSC) or 25 (PAL)

[DJRumpy]

yf2001usa, you convert the video back to FILM framerates, and then use pulldown to make it appear to be 29.97 frames per second. It's the same method used by most manufactured DVD's you buy at the store. The video on them is actaully 23.976 fps (for NTSC of course). These pulldown flags tell the DVD player which fields to duplicate. These duplicated fields create additional frames, which then increase the playback framerate. This is all done on the fly during playback. By use the FORCE FILM option, DVD2AVI can be told to ignore these pulldown flags, essentially restoring the video to it's true 23.976 framerate, and removing those duplicate interlaced frames.

[borghe]

I actually have a question about this. Everyone says you can't just change the internal framerate. However, after having found the little wonder/miracle program that is pulldown.exe, couldn't I just run:

pulldown source.m2v dest.m2v -nopulldown -framerate 23.976
pulldown dest.m2v final.m2v

It would seem to me that if the PAL video is just sped up from the 24fps film, slowing the mpeg back down to 23.976 and doing the proper conversion on the audio would solve the problem without reencoding (and thus losing quality). This is of course in theory as I haven't tried it (yet) but it seems logical.

[DJRumpy]

I've never tried it this way, but it should work, assuming the framerate flag simply tells the decoder what fps to play the stream back at. You'll have to demux, since pulldown won't work on a multiplexed stream. Not a problem, since you have to resample your audio anyway. I never use the framerate setting. I'll see if I can dig something up on their website. In theory, it should work assuing that's all the framerate flag does. In practice...

I would be interested to find out. You should get the GUI for pulldown, and save yourself some typing. It's called "PullDownBatchFE". http://guiguy.wminds.com/cgi-bin/downloader.cgi?site=1&filename=pulldownbatchfebeta.zip
It requires pulldown.exe (v.99d)

[borghe]

The only problem I can think of is that the video will still be 720x576. I guess I hadn't thought of that. Will have to think about this some more.

[spidey]

If you'd like a work around for the resolution, as long as that's the route you're looking for, you may be able to try that DVD Patcher (in the tools section), that'll let you convert the resolution down from the PAL one.

Hi DJR

[DJRumpy]

Too funny. I wasn't able to find anything on the author of the original tool set (bbtools). So I ran a few tests, and came to the same conclusion. Although you could change the framerate (that part does work), the frame size still needs to be changed from PAL to NTSC. This of course, requires a re-encode.